Summary

Week 5 – Educational design or whatever you want to do
A “Geodreieck” is a piece of plastic that most students have to use in school to create different geometries in the math classes. It can be used to construct angles as well as parallel lines. 
And it gets lost. Permanently. We always have one or two spare here at home, in case one gets lost. 
So I thought about the idea that you could make a Geodreieck by yourself. And yes it works well.